A trope in which the gravity functions in any way other than "what goes up must come down". More common in modern games than in earlier ones, but there were some in the days of the NES. Usually the change of gravity is local to the player, but sometimes not. Almost always counts as an Interface Screw. More often than not a puzzle level.

The Unusual Planet: Planets don't have to be round: they can be cubes, pyramids, donuts, question marks, or any kind of crazy shape. Gravity tends to pull in a direction orthogonal to the angle of the ground instead of towards its center; for example walking over the side of a cube planet will instantly flip gravity 90 degrees towards the next face (instead of the character seeming to walk over the crest of a mountain, it's more like walking over a cliff).

The Inverse Planet: The level is round, but in the other way - a hollowed-out space that pulls the player toward its walls.

Cross Gravity: Gravity pulls in a particular direction that's not down (as seen by the viewer) - maybe to the left.

The Rotating Castle: The entire level rotates, but the player stays in place. Gravity continues to pull down, but it has a similar spirit to the Upside-Down World mentioned above.

Toroidial Gravity: Gravity wraps around the outside of a cylinder; objects that start falling without running into something will just circle the object indefinitely.

The Variable Gravity Chamber: Gravity changes based on your physical location in the room. The direction of gravity's pull is usually indicated in the background, or there are specific devices that change the direction of gravity.

Fun With Gravity: Gravity changes at fixed intervals. At best, a severe Interface Screw. At worst, timing will be essential to prevent you from flying into a Bottomless Pit (or Ceilingless Sky), in which case expect this level to be Nintendo Hard as all get out.

Heavy Zone/Light Zone: Gravity is either much greater or much less than usual.

In video games, especially platformers, frequently a form of Gimmick Level.

Examples:

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Anime & Manga

Dragon Ball Z used the "spherical planet" variation; when Goku reaches the end of the Serpent Road, he looks around and sees something floating in the sky above him, so he jumps towards it. To his surprise, he starts falling towards it. Also the gravity machines the Saiyans use for training later in the series, except those were intentional. And instead of "what goes up must come down" being the norm, it's "what goes down stays down, and everything goes down. No exceptions." Heavy Zone doesn't even begin to describe it—Vegeta claims to have trained (off-screen) at over 400 Gs, and Goku trains at both 10 and 100 (and several levels in between) on-screen.

Two Stands from Jojos Bizarre Adventure have the power to mess with gravity, one of them can create a zero gravity environment in any closed place, and the other can make things fall away from him, making it seem like if the floor were a wall.

The Reverse World in Pokémon is a place where Reality Is Out to Lunch and gravity doesn't seem to abide by any particular rules. A researcher who's been there for years seems to have memorized where gravity is normal, lessened, heightened, or nonexistent, but because there's really no pattern to it, no one else can figure it out (including the viewers).

In Knights of Sidonia, in order to evade an incoming Gauna, the eponymous ship's captain orders an emergency diagonal acceleration. The ship's artificial gravity generator is unable to compensate, causing many structures to collapse and people to fall to their deaths against the far side of the ship.

In Guardian Fairy Michel, Salome expresses surprise that there even is a gravity fairy. And yes, it causes gravity to turn wonky. Which has been overtaxing marathon runners for several months in a certain village, as it turns out.

That has been the subject of many Shout Outs, some of which are noted above.

Comics

In A Matter of Some Gravity, a Scrooge McDuck story by Don Rosa, Magica De Spell uses a special magic wand to turn Donald's and Scrooge's personal gravity sideways. Magica escapes with Scrooge's Number One Dime but despite the difficulties they give chase (hilarity ensues, to say the least). When Donald and Scrooge manage to catch up with Magica she turns their gravity upside down so they're pulled up to the sky.

Calvin and Hobbes has Calvin's parents forgetting to pay the gravity bill, and his personal gravity field reversing.

Fan Works

Apparently, the Trans-Galactic Republic uses this as a security system in Origins, a Mass Effect/Star Wars/Borderlands/HaloMassive Multiplayer Crossover aboard its Star Dreadnaughts. Armando Bailey encounters such a system of gravity-reversal wherein any unauthorized personnel are unceremoniously dumped on their heads while standing on what counts as the ceiling gravity-wise. He is able to defeat it with the Force, which the designers never saw coming. A corporate security system incorporates the "Heavy/Light zone" version to the point where small animals are reduced to bloody puddles should they wander across the plating at full power.

Film

The freaky room at the end of Labyrinth where down is wherever your feet are. Jareth is right at home here - the heroine, not so much.

Inception has several scenes in the dreamworld where gravity is sideways, rotating, or simply doesn't exist. This is because whatever the character's bodies are feeling in one dream level (or reality) is carried over to the next lower level. The fact that the dreamers' perception of time is accelerated in each dream level only heightens the experience. Thus, the centrifugal force of driving around a corner results in the dreamers sliding across a hotel's hallway, several seconds of freefall allow a few minutes of weightlessness, and a van rolling down a hill results in an absolutely awesome fight scene.

The A Nightmare on Elm Street films used rotating sets to incorporate this trope into several dream-sequences, including the death-scene of Tina, Freddy's first on-screen victim.

In Ultraviolet, Violet wears a gravity leveller on her belt that allows her to use this trope to great effect. Her motorcycle has such a device as well, allowing her to flee from her foes along the sides of skyscrapers.

In TRON: Legacy, the Disk Wars area in which Rinzler fights has this feature. Since Rinzler is aware of this, he's able to land gracefully on his feet, unlike poor Sam, whose landings are a bit rougher.

In Star Trek Into Darkness, the artificial gravity inside the Enterprise fails in one sequence, causing crew members to fall relative to the nearby planet's gravity well while the ship twists and turns around them.

Project Moonbase. People walk along the corridors of the Space Station upside down past people going the other way due to its variable gravity. They avoid floating off the floor because they were wearing "magnetic shoes". Signs request that you PLEASE DO NOT WALK ON THE WALLS.

At the beginning of Revenge of the Sith, gravity remains oriented toward Coruscant's surface as General Grievous's flagship alternately falls nose-first toward the planet, and is brought under control again, resulting in some fun running-on-walls scenes. The novelization explains that the ship's artificial gravity is on the fritz.

Literature

Robert A. Heinlein's Glory Road. While exploring the Tower in Karth-Hokesh, Oscar Gordon and his team encounter areas where the gravity reverses itself and the ceiling becomes the floor.

The mist in the maze in Harry Potter and the Goblet of Fire acts as a local inverse-gravity zone to anyone who steps into it. After a few seconds of feeling like he's about to fall into the sky, Harry works up the nerve to take his feet off the "ground", at which point he snaps back to reality.

Harry, in the center of a major Ley Line convergence, stores up a few seconds of gravity from an area the size of a small city to flatten an army of degenerate vampires.

In the X-Wing Series, exploited by the Imperials who run Lusankya—which to its inmates seems to be a penal mining outpost, but in fact they are in an area with artificial gravity and are standing on the ceiling. Thus, if they try to escape, they will try to go 'up' to the surface, which is actually deeper into the facility. Corran Horn, after an experience that caused him to form the theory, tested it by tossing a stone up and out of the gravity field he was in; sure enough, the stone fell up to the "ceiling". Later, Corran encountered a cylindrical room with a red line going through it from the floor, along one side, to the ceiling. After attempting to walk the room straight through (with stomach-turning results), he belatedly realized that particular room was a transition room, where "down" was oriented along the red line.

Ciaphas Cain (HERO OF THE IMPERIUM) was once aboard a Space Hulk (derelict starships that acrette together over millenia) where down would occasionally change if one ship's gravity generator was stronger than the others, leading to having to crawl along corridors to avoid a very long drop.

In the season 6 episode titled "Abyss", the System Lord Ba'al is shown to be experimenting with gravity. Ba'als fortress has prison cells which at first appear to be long hallways, however, once a prisoner is added to said cell, Ba'al turns on some artificial gravity in the cell and the far wall becomes the new floor. Any prisoner within said cell then sees their cell as a 50 foot tall pit with sheer walls and no doors. The only way to escape said cell to power down the entire fortress thus turning off the artificial gravity.

Star Trek: Enterprise. The "sweet spot", located halfway between the bow plate and the artificial gravity generator, is the one place on the NX-01 Enterprise where you can sit on the ceiling. Captain Archer uses it in one episode to get the drop on some aliens who decided that All Your Base Are Belong to Us.

In the Agents of S.H.I.E.L.D. episode "The Asset", Dr. Hall's device causes the gravity of the area to periodically change directions.

MythBusters filmed part of one episode on a zero-G airplane similar to the Vomit Comet. They used a lunar gravity equivalent to test several of the running motions used on the lunar surface. Jamie pointed out the downside of using such an airplane: you go from zero G (or, in their case, 1/6 G) to 2G many times.

An episode of Doctor Who had the TARDIS materialise on its side, with the door uppermost. Gravity inside the TARDIS was therefore at ninety degrees to gravity operating in the world outside. The Doctor and his assistant did not realise this until they opened the door and tried to step out through the interface between the two gravities. Interesting things happened.

In the original Manual of the Planes (1987), while on the Elemental Plane of Air travellers could choose the "down" direction and automatically move in that direction. (Provided that they knew that the laws of physics didn't apply in the Plane of Air... otherwise, they'd assume that "down" was whichever direction their feet were facing, and fall infinitely. Not that it would kill them, of course.)

The Dungeons and Dragons example above extends all the way to 3.5. In the fourth edition, they have some different Gravity Screws. On some planes gravity is subjective, so you can walk across any surface including walls and ceilings. Also, you can simply choose not to be affected and effectively fly with poor maneuverability. Special mention goes to the githzerai and their monasteries in the chaotic plane of Limbo. They practice a unique form of martial arts that actually relies on their buildings' subjective gravity.

The Reverse Gravity wizard spell.

In the Spelljammer setting, ships maintain their own gravity (which allows them to hold on to a small atmosphere) which extends from the hull in a horizontal plane. If you fall overboard, you'll pass through the plane, decelerate, then fall back up again and end up floating around like a cork. The risk lies in floating to the edge of the plane - go over that, and you'll be subject to regular gravity for the area. If you're in space, you drift off - if you're above a planet, you fall. Either way you're in trouble.

A Polish tabletop RPG, Strefa Smierci ("Death Zone"), featured gravity anomalies as one of the dangers of the wastelands; an anomaly would appear as an aftereffect of the area getting bombed with high-level phlebotinum. Unexpectedly walking into one was one of the easiest ways to die there.

GURPS has rules for operating in high or low gravity. Zero gravity can result in the character becoming physically ill.

Video Games

This is the primary mechanic of The Bridge. Your character can't jump, or even walk up steep slopes, but he can rotate the game world as many degrees as you want.

Sonic 3's Carnival Night, Sonic 1's Scrap Brain Zone, and Sonic CD's Metallic Madness Zone all feature wheels that function as miniature planetoids. Death Egg Zone from Sonic And Knuckles involved spinning antigravity passages and a sideways gravity chamber in Act 1, then Act 2 involved gravity frequently switching upside down and back—and one of the bosses could only be defeated by manipulating this mechanic. Sonic Adventure 2 and Shadow the Hedgehog feature Crazy Gadget and Space Gadget respectively, both defining examples of gravity that can go in any of a number of directions.

The Mad Space level is more like most of Super Mario Galaxy, with the direction of gravity being dependent on which planetoid you're closest to. There are also drums in Final Chase that pull you onto their surface when close enough.

And Cosmic Wall, also from SA2, was a Light Zone.

The Cyber Track Zone in Sonic Advance 3 has areas within all three Acts where gravity reverses automatically. As well as Cosmic Angel in Sonic Advance, Egg Utopia in Sonic Advance 2, and Dead Line in Sonic Rush.

The Distortion World in Pokémon Platinum has you walking on the walls at times, and it kind of messes up the control system a little right after you get back.

The anime's equivalent from Giratina and the Sky Warrior, the Reverse World, is even worse with how gravity works. One scene involves Team Rocket all standing at three completely different angles while close enough to reach out and touch each other.

Moves like Trick Room and Gravity mess with your mons' speed and who moves when.

The Forest Temple in The Legend of Zelda: Ocarina of Time: There are switches you hit to twist or untwist a long hallway, so you could end up entering the room at the other end either walking on the floor or on one of the walls, but the camera always turns to keep Link seemingly on the ground, while everything else is moved.

Although it wasn't even interactive, there's a twisted tunnel at the beginning of Majora's Mask - the player walks along the "floor", but it twists around the room (which the player automatically walks through). Cheating, or bomb hovering over the door allows you to re-enter the hallway, and reveals that it works exactly the same as the twisted rooms in Ocarina of Time.

V in the Game Boy series has Saturn's level, with examples of high and low gravity.

Cyber Peacock's level in Mega Man X 4 had buttons that flipped the stage (gravity still pointed downwards) every so often.

Gravity Antonion's stage in X8. Dark Dizzy's level in X5 has a similar gimmick.

In the final area of Mega Man Legends 2, there are consoles that let you set gravity to low, normal, and high, allowing you to access different areas based on the current gravity (such as jumping on a weak floor in high gravity to break it). You're also forced to high gravity immediately whenever you touch security lasers in the area, making you take detours when you need to keep low gravity.

Megaman Network Transmission has the Strange Grav Area, which is basically a Variable Gravity Chamber Details This network has Heavy Zone areas, some stronger than others, along with Reverse Gravity areas., and the No Grav Area, which works as a Light Zone throughout. The given Hand Wave for Gravity Screw in Cyber Space is that these areas affect Navis' processing speeds.

RosenkreuzStilette had a level late in the game that worked just like Gravity Man's level, with flipping gravity. Given that the game was a tribute to Mega Man and Castlevania games, it's no surprise, really.

The original game had something similar, in that the characters walked on the floor, walls, and ceiling of the first room of Wonderland at different points. The difference is that they never jumped from wall to floor and so forth; they had to go around to use doors and such.

In Kingdom Hearts 3D: Dream Drop Distance, you periodically experience this while fightingRinzler, being forced to fight on the ceiling with inverted controls. It's disorienting enough that it tends to be better to go on the defensive until things go back to normal.

Kael'thas Sunstrider in World of Warcraft turns the gravity off completely, leaving players "swimming" in the air.

Some levels in Psychonauts, such as Sasha's Shooting Gallery which takes place on the outside of a cube, and The Milkman Conspiracy, a literally twisted suburb with streets curving every direction.

Lungfishopolis from the same game is also an example of a Heavy Zone—your jumps are slower, your Ground Pound is different, and you can't levitate due to your weight.

Fairly common in Prey, both with switches that changed gravity, and wallwalks, which were walkways that often turned upside down, allow people on it to defy gravity.

In Elasto Mania, collecting some apples will change the direction of gravity.

Metal Storm let the player do this pretty much at will. Some later levels required you to flip gravity multiple times in the middle of jumps to clear obstacles without falling into a Bottomless Pit on either end of the screen. It also utilizes Gravity Screw as a weapon with the Gravity Fireball powerup that turns every flip into a blazing charge.

Do not forget the boss battle where both the floor and the ceiling (or vice versa, as the case would be) are harmful, and the only places where you can stand are the very bosses you are destroying.

In Meteos, the level of gravity on the various planets runs the gamut, but the most notable is Gravitas. The gravity is so high that blocks hit the ground instantly and don't rise at all when they're first matched.

Hevendor is the exact opposite. All pieces launched are completely and instantaneously removed from play.

Odd example with the c64 game Ancipital which should fit the trope but isn't in any of the categories already described - Gravity changed depending on if you were standing on the floor, ceiling or walls, jumping flipped gravity 180 unless you decided to land on a wall. I suppose it could be described as a variant of the Variable Gravity chamber...

Ratchet in the Ratchet and Clank series gets gravity boots from the second game forward. When on a corresponding gravity surface Ratchet and his weapons have their own personal gravity.

One game was going to have gravity spheres with a similar effect, but they were deemed too confusing.

Dead Space had a lot of sections like this. There were anti-gravity chambers inside the ship, and external sections where if you jumped wrong you'd just float off into space.

Don't forget the chambers where the gravity plates have gone haywire; if you see a faint pillar of translucent energy crackling up from the ground, do not walk into it! The distorted gravity will rip you apart in an instant. On the plus side, Necromorphs also get torn into pieces if they enter these spaces, either deliberately (though the AI is generally good enough that they'll go around them, they will charge right into them if you're lucky) or by being knocked into them.

The Brinstar Depths level in Super Smash Bros. Melee rotated. However, gravity continued to pull in the same direction, so if you didn't jump just before it happened, you'd get pulled off of the level.

And Battlefield of the same game features floaty gravity, but only when fighting wireframes..

The Magic School Bus Explores The Solar System computer game features Heavy Zone/Light Zone gravity for the planet-based platforming levels in the game. Planets with less gravity, like Mercury and Pluto, would allow you to jump really high, while planets with a lot of gravity, like Jupiter (or rather, its moon Io) and Saturn('s rings) would make it so you could barely jump at all. (There were also items that would increase or decrease your jumping ability.)

A third of the levels in Elebits have no gravity, and any user-made level can have weakened gravity.

The free Space Cadet 3-D Pinball game that comes with many Windows computers has an unlockable effect where a gravity well appears in the middle of the board, attracting pinballs towards it until one is sucked into the center, at which time gravity is normalized again.

The first secret level in Quake had about a fifth of the usual gravity.

The fourth hole in Fuzzy's World Of Miniature Space Golf was called "Goofball Gravity", in which the ball rolls uphill.

The original Thrust had reverse gravity equivalents of all the levels once you got past the normal gravity versions.

World of Goo features a Planet-type level and a Rotating Castle-type level.

In Serious Sam: The First Encounter the level "Sacred Yards" contains an area where some places have reverse gravity. Very trippy, especially when quickly moving from one area to the other and back.

The Second Encounter has a level with some confusing mechanics, including a room inside a cylinder (with gravity directed towards the walls), a spherical-type hallway immediately after, and several areas with low gravity. How do you like a tiny room where everything constantly bounces up and down at warp-speed, including the hordes of enemies?

Crystal Caves has a couple of levels with "low gravity" (although it manifests just as your character being shoved back when he shoots), and there are also levels with reversed gravity. The game also features a reverse-gravity powerup in some levels and a cheat code that lets you reverse the gravity whenever you want.

Several levels in Unreal Tournament have low gravity, either everywhere in the level or just in certain areas. The game also comes with a mutator you can use to force low gravity when playing, regardless of what the map specifies.

It is possible to design levels with rooms having reverse gravity or the ability to walk up on the wallsnote Or to be exact, cheating with warpzones to make it look like that. It's tricky and has a good chance of crashing the game but it's possible. Simply setting negative zone gravity would make players fall upwards and do a headstand on the ceiling.. In fact, there is a map triggernote NitrogenZone that can be used to induce a zero gravity environment where the player can move as if underwater.

Cave Story had a strange variant of this in the Outer Wall area, where the player fell normally, but enemies and powerups fell sideways— even the powerups that weren't normally affected by gravity.

It might be that the island was moving and you were on the outside wall on the "front" of it. Therefore, The island was moving into the powerups faster than the items could fall "downwards".

Armed And Dangerous features a literalGravity Screw: The Topsy Turvy bomb, a weapon that consists of a giant screw with a handlebar that screws itself into the ground. It then briefly turns the entire world upside down, causing enemies nearby to fall into the sky (you don't, because you've got this handy giant screw to hold on to)... And then, shortly after, fall back to the ground with messy results.

Later on in System Shock 2, you make it into the UNN Rickenbacker, where the artificial gravity has flipped upside down. Fighting cyborg assassins in an inverted chapel is a rather creepy experience...

Not to mention that by reversing the gravity, you have most likely caused the death of a certain character by dropping him unexpectedly on the ceiling.

The upper floors of Constantine's mansion in the Thief mission "The Sword" feature Gravity Screw effects, among other weirdness.

Dynamite Headdy had Vice Versa, a level where the player could turn the level upside-down using switches. The miniboss here had to be beaten by dropping balls on it. Right after that was Twin Freaks, where the look and attitude of the boss changed depending on whether gravity was reversed.

In Dystopia, Cyberspace uses a combination of "variable" and "light zone" gravity. In nodes, touching certain surfaces changes the direction of gravity. In tubes, there is no gravity, but up and down change depending on where you are.

Kat's main ability in "Gravity Rush" is manipulating the gravity of her environment to her benefit, be it to fight baddies or just to get to the top of a building quicker.

The circus-themed levels in Castlevania: Portrait of Ruin do this with round levels where the stage's gravity points a certain direction relative to the landscape (outward first, then inward), while your characters' gravity is constantly downward. It's certainly a surprise when you defeat Medusa and realize she's been fighting upside-down the whole time.

Super Mario Galaxy has the second mission of the Dreadnought Galaxy, which has platforms going normal way up, upside down and sideways at various points along a route where Mario is being fired at by various cannons. Definitely falls under the Nintendo Hard bit and then there's the purple coin mission. And similar kinds of puzzles in Bowser's Dark Matter Plant.

Super Mario Galaxy 2 has Flipsville, in which you flip grates to reverse gravity. Where gravity's pointing is denoted by arrows in the sky. There's also Upside Dizzy, which not only has segments of this mansion that have gravity point towards the ceiling, gravity flips in several parts of the level on its own.

Mario Kart 8 uses anti-gravity as a new gameplay mechanic, allowing racers to drive sideways and even upside down.

Castle of Illusion had items in its Toy Palace level that reversed gravity in the level. It was somewhat useful: all enemies on-screen when you pick up said items would be destroyed when they fell down (or up, as the case may be) from the floor.

In the Flash game Epsilon, you control a ball and a pair of wormholes collecting orbs to power the exit. Eventually, you encounter devices that cause gravity to point in a different direction or turn it off entirely. On level 5g, this message appears;

As far as the laws of mathematics refer to reality, they are not certain.

As far as they are certain, they do not refer to reality.

...and all of a sudden, the laws of gravity get bent so hard it's a wonder they don't just fall apart. Not only have the event horizons of the wormholes grown, wormholes now alter gravity entirely. You could be pointing down before going in one wormhole, and left after you come out the next. And it also can be changed by the direction you enter them!

Mass Effect 1: Climbing Citadel Tower. Shepard and their team step out of the elevator and onto the wall, as the camera rotates to change perspective. Killed enemies will proceed to fall towards what would normally be down.

Heretic Station in Mass Effect 2 lacks any gravity; however, the player and their squadmates remain grounded by using special equipment. Thus, the lack of gravity doesn't affect gameplay...but enemies float away amusingly when you kill them.

In one level in Modern Warfare 3, you play as one of the bodyguards of the Russian president as his plane gets hijacked by terrorists. While fighting your way through the traitors, the plane enters freefall for a few seconds during which you have to fight in weightlessness until someone gets the plane back under control. Until it crashes into the German countryside a few minutes later.

McDonaldland (or McKids depending on locale) has some platforms with cogs on the ends which, if run across, will flip you onto the other side of the platform, reversing gravity in the process.

In Stunt Copter, where you repeatedly jump from a helicopter into a moving haywagon, gravity varies between levels. A helpful readout informs you of the Earth's current mass, eg. NORMAL, HEAVY, or OH BOY.

The fourth stage in the original Gradius is an inverted version of the first stage, complete with reverse-gravity erupting volcanoes.

The Ur-Example of Gravity Screw in video games is located in Spacewar!! where the ships and missiles can optionally gravitate towards the center of the level.

The Star Control games use the same setup, with each battle being two ships dueling in space around a planet.

The SNES game Mohawk & Headphone Jack uses the Inverse Planet variation, but in an unusual case for the 16-bit era, makes full use of the system's rotational capabilities so that the floor is always facing down. And yes, the entire game is like this, not just one level. The result can, needless to say, be very disorienting at times. You can see it in action here.

In Tales of Monkey Island Chapter 4: The Trial and Execution of Guybrush Threepwood, one of the buttons on De Singe's Auto-Trepanation Helmet turns the whole room in the lab upside down along with Guybrush for a few seconds.

A level in Kirby's Epic Yarn has gravity switches that can turn the gravity on or off.

In the final parts of Limbo there are switches that at first invert gravity for some select objects, later they affect everything including you; and near the end gravity starts changing periodically.

De Blob 2 involves gravity plates, allowing Blob to climb up certain walls. The final level also takes place in space, which has a few small planets.

The interior of the alien ship in Crysis has no gravity whatsoever, despite being buried under a mountain. The switch is not sprung on you in a hectic situation, and so you have a fair amount of time to get the hang of moving in zero G before encountering enemies. Thankfully, your suit has some sort of maneuvering system that means you aren't particularly hindered by this. It's actually rather fun once you get the hang of it.

Unreal 2 has a ships artificial gravity play up, first allowing to jump large distances, then pulling you against different surfaces.

One of the levels of Marble Madness is the Silly Stage, where you must guide the marble from the bottom of the course to the top, rolling it uphill with the same ease the marble would normally roll downhill.

Roll Away is of the Variable Gravity Chamber kind. The plane that the ball is currently rolling on is down and gravity shifts when the ball rolls up an inward bend or down along a 1-cube-width drop.

BioForge has a room, deep in the ruins of the Gravity Master aliens, where you're stuck in orbit around an object in the middle and can only move using your gun, via Recoil Boost.

Pheus and Mor has areas where the characters can walk on walls and the ceiling.

In Rogue Legacy if your character is "born" with vertigo, every bloody room is upside-down. This is about as much fun as it sounds and makes an already Nintendo Hard game so much more difficult that deliberately suiciding isn't uncommon.

In MechWarrior Living Legends, TSA_Extremity takes place on a rotating asteroid, and has a fourth of normal gravity, allowing Battlearmor to go spiraling through the sky in near free-fall. User-made maps such as TSA_Mariokart and TSA_RACE_Kaido feature gravity "spheres" which modify gravity in an area - such as nullifying it, causing gravity to increase by an order of magnitude sideways or creating a gravity well that causes mechs and tanks to orbit it.

One level in Pixel Junk Eden has an invincible enemy that periodically appears and performs this on you.

Monument Valley uses location-specific gravity: gravity pulls down onto whatever you're standing on. If you can find a smooth path to do so, the game will happily let you walk up walls. Given that the game is built around Alien Geometries, this is only to be expected.

The CCC series has a rewind-style episode where gravity is altered for someone thanks to a drug. On a sobering note, if you find and watch the forward version, this trope is played realistically when the drug wears off and he begins his long fall back down...

Webcomics

In Schlock Mercenary, gravity is a weapon, and gets used in all sorts of perspective-bending ways. The "Mallcop Command" arc even involved a group of Parkata Urbatsu runners who took advantage of the lack of Artificial Gravity in an old space station to run amok for fun and profit (by selling videos of the acts, not theft).

Tove: The gravity of the planetoids that Tove bounces between when she is first transported to space seem to have a gravity of their own, although it appears one is just fine standing on any of them as long as they don't jump.

Gravity Falls is NAMED after this trope. While first dismissed as a Punny Name, it becomes an extremely Meaningful Name after Stan activates the portal and the entire town is torn to pieces by gravity anomalies.

Real Life

Outer space. Surface gravity is dependent on the object's diameter, as well as the mass. The smaller volume mass occupies, the higher the surface gravity - culminating in black holes whose infinitely small size creates a Heavy Zone that breaks physics. Even the Earth could theoretically be turned into a black hole, though the event horizon wouldn't be very big. The moon in particular is a well-known Light Zone, being the only one that people have walked (bounced) on.

In order to simulate Zero G conditions, a type of jet affectionately referred to as the "Vomit Comet" is used. Essentially an empty transport plane with the cabin covered in padding. The pilots take the plane into a climb and then gently push the nose down, giving the passengers a short period of time where they are (seemingly) weightless. This is of course less a case of screwing with gravity and more a case of screwing with the way the human brain perceives movement. These aircraft have been used for such serious endeavors as training astronauts and doing a swimsuit photoshoot of Kate Upton in zero g.

In an experiment, participants were given special glasses that would reverse the image, making everything appear to them as upside-down. Eventually, the participants' brains adjusted, and the images appeared re-reversed, thus appearing normal - but only while still wearing the glasses. Once the glasses were taken away for the second half of the experiment, the participants saw everything as upside-down again until they readjusted.

There are attractions that consist of a rotating chamber with a curved floor, like the inner surface of a sphere. To people inside it, gravity always seems to point towards the floor, since it's actually the sum of gravity and the centrifugal force. When walking from one end of the chamber, it appears that the entire chamber inclines under one's feet, and other people appear to be walking on walls.

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